Messages in this thread | | | Date | Tue, 17 Dec 2013 19:59:00 +0800 | From | Alex Shi <> | Subject | Re: [PATCH 2/3] x86: mm: Change tlb_flushall_shift for IvyBridge |
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On 12/16/2013 09:59 PM, Ingo Molnar wrote: > So if the kbuild speedup of 1-2% is true and reproducable then that > might be worth doing.
I have a Intel desktop and need it for daily works. Wonder if Intel guys like to have a try? I assume the patch is already in Fengguang's testing system. > > Building the kernel is obviously a prime workload - and given that the > kernel is active only about 10% of the time for a typical kernel > build, a 1-2% speedup means a 10-20% speedup in kernel performance > (which sounds a bit too good at first glance).
Maybe a extra time tlb flush causes more tlb refill that cost much user space time. -- Thanks Alex
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